noun \ˈsəmp\

Definition of sump

  1. 1 :  a pit or reservoir serving as a drain or receptacle for liquids: such asa :  cesspoolb :  a pit at the lowest point in a circulating or drainage system (such as the oil-circulating system of an internal combustion engine)c chiefly British :  oil pan

  2. 2 British :  crankcase

  3. 3 [German Sumpf, literally, marsh, from Middle High German — more at swamp] a :  the lowest part of a mine shaft into which water drainsb :  an excavation ahead of regular work in driving a mine tunnel or sinking a mine shaft

  4. 4 :  something resembling a sump :  sink 2

Origin and Etymology of sump

Middle English sompe swamp — more at swamp

First Known Use: 1653

SUMP Defined for English Language Learners


noun \ˈsəmp\

Definition of sump for English Language Learners

  • : a low part or area where liquid collects when it drains from something

Learn More about sump

Seen and Heard

What made you want to look up sump? Please tell us where you read or heard it (including the quote, if possible).


a trip made at another's expense

Get Word of the Day daily email!